1 files changed, 3 insertions, 0 deletions
diff --git a/qmake/library/proitems.h b/qmake/library/proitems.h
index dcff970600..16dd9386c8 100644
--- a/qmake/library/proitems.h
+++ b/qmake/library/proitems.h
@@ -100,6 +100,7 @@ public:
     bool operator!=(const QString &other) const { return !(*this == other); }
     bool operator!=(QLatin1String other) const { return !(*this == other); }
     bool operator!=(const char *other) const { return !(*this == other); }
+    bool operator<(const ProString &other) const { return toQStringRef() < other.toQStringRef(); }
     bool isNull() const { return m_string.isNull(); }
     bool isEmpty() const { return !m_length; }
     int length() const { return m_length; }
@@ -233,6 +234,7 @@ public:
 
     int length() const { return size(); }
 
+    QString join(const ProString &sep) const;
     QString join(const QString &sep) const;
     QString join(QChar sep) const;
 
@@ -246,6 +248,7 @@ public:
     void removeDuplicates();
 
     bool contains(const ProString &str, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
+    bool contains(const QStringRef &str, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;
     bool contains(const QString &str, Qt::CaseSensitivity cs = Qt::CaseSensitive) const
         { return contains(ProString(str), cs); }
     bool contains(const char *str, Qt::CaseSensitivity cs = Qt::CaseSensitive) const;